op 	 {
  name: "NonMaxSuppression"
  input_arg {
    name: "boxes"
    type: DT_FLOAT
  }
  input_arg {
    name: "scores"
    type: DT_FLOAT
  }
  input_arg {
    name: "max_output_size"
    type: DT_INT32
  }
  output_arg {
    name: "selected_indices"
    type: DT_INT32
  }
  attr {
    name: "iou_threshold"
    type: "float"
    default_value {
      f: 0.5
    }
  }
}
